Pile wire



y 1930. M. B. BEHRMAN 1,757,509

FILE WIRE Filed April 19, 1928 INVENTOR Patented May 6, 1930 a TENT MARCUS B. IBEHRMAN, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE LOX SEAL COR- PORATION, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK IE'ILE WIRE Application filed April 19,

My present invention relates generally to pile wires, and has particular reference to the blade-holding pile wire head.

The pile wires to which my invention relates are those which are employed in the manufacture of cut pile fabrics and are generally provided with a blade-receiving channel in which suitable blades or cutters may be positioned. Such pile wire heads may be advantageously constructed of a channelshaped or U-shaped element, the rear portion of which is provided with an undercut recess for the accommodation of the rear end or tip of the blade, and the forward portion of the head being provided with means, such as a suitable tab, for engaging and supporting the forward portion of the blade.

It is an object of my present invention to provide a pile wire head of this character whereby the employment of the usual flexible wafer type blades is facilitated, and wherein the construction is such that the smooth employment of the pile wire is enhanced and the manufacturing cost thereof minimized.

Pile wire heads of the character mentioned have generally been provided with enlarged spoonlike tips serving to increase the support of the forward portion of the blade and being provided with a tab or the like for engaging the forward edge of the blade. An object of my present invention is to provide a pile wire head wherein the necessity for such a spoonlike head has been obviated.

Another object of my invention lies in providing a construction of the character mentioned wherein the absence of the spoonlike head permits other structural means to be provided with great ease for enhancing the smooth operation of the device.

One feature of my invention lies in providing a channel-shaped element whereof one wall is extended forwardly with its upper edge substantially aligned with the upper edge of the wall itself. A construction of this character obviates the necessity for an enlarged tip whose production of necessity calls for more material and greater manufacturing cost.

1928. Serial No. 271,150.

Another feature of my invention liesin striking an integral tab out of the upper edge portion of said extension for engaging and supporting the forward edge of the blade, the provision of such a tab entailing less labor and less expense and being also simpler than the provision of supporting means in association with the enlarged heads heretofore usec.

A still further feature of my invention lies in so constructing the extremity of the extension mentioned as to provide an auxiliary cutting edge which will function advantageously in the event that the blade itself breaks or drops either partially or entirely from the channel.

The breakage of a blade during its employment is a source of great annoyance. Not only are the fabric loops not cut as they should be, but they are extremely likely to become damaged. The auxiliary cutting edge above mentioned obviates this disadvantage, and although its efficiency may not be as high as that of the actual blade, it does serve at least to prevent damage to the loops which should have been encountered by the blade.

Furthermore, the breakage of a blade in a pile wire head of the character to which this invention relates necessitates the careful removal of all the broken constituent parts thereof before a new blade can be substituted therefor. The removal of the rear tips of broken blades, particularly where the blades are of the low-angularity type, and particularly where these tips are accommodated in an undercut recess, is extremely tedious and a frequent cause of much delay.

One of the objects of my present invention is to obviate this particular disadvantage, and a feature of my invention lies in providing the wall portion of the channel with an aperture or apertures positioned adjacent to the undercut recess.

For the attainment of the foregoing objects and such other objects as may hereinafter appear or be pointed out, I have constructed two types of pile wire heads embodying the features of my invention and illustrated in the accompanying drawings in which Figure 1 is a side elevation of a pile wire head of relatively small height embodying the features of my present invention and with a blade shown therein;

Figure 2 is a bottom view of the device shown in Figure 1; and

Figure 3 is a perspective view of a modified type of pile wire head embodying the features of my invention, the dot and dash lines indicating the position a blade would assume therein.

The pile wire holder illustrated in Figure 1 comprises a main portion 10, and a channelshaped blade-accommodating portion comprising a wall 11, the bottom wall 12, and the rear wall 13; In the rear end of the channel defined by the walls 11, 12, and 13 1 have provided an overhang or insert 14 constructed in any suitable manner for the purpose of providing an undercut recess 15 beneath it for the accommodation of the rear end or tip 16 of the blade 17. I I

In the illustrated embodiment, the rear wall 13 is extended forwardly to provide the extension 18, and it will be noted that the upper edge 19 of this extension forms a smooth straight line continuation of the upper edge of the wall 13. Immediately in front of the channelled element, the extension 18. is provided with the struck-up integral tab. 20 which accommodates and supports the forward edge 21 of the blade 17.

"The tab 20 is provided by a vertical cut 22 and a horizontal cut 23, the latter being substantially parallel to the edge19, the material bounded by the cuts 22 and 23 being thereupon forced out of the plane of the extension 18 .to provide the tab 20. It is to be noted that the forward or attached portion of the tab 20 is disposed along an oblique line 24, i. e., a line which is not parallel to the cut 22. This facilitates the engagement of a blade constructed as shown in Figure 1 andincreases the-assurance that the forward portion of the blade will not spring upwardly out of the channel.

.The extremity 25 of the extension 18 is turned upwardly as shown in Figure 1 and is rearwardly attenuated or sharpened as at 26, this sharpened portion being preferably bent toward the forward wall 11 so as to be substantially aligned with the cutting edge 27 of the blade 17.

When the pile wire is employed, the blade 17 is first applied with its rear end 16 within the undercut recess 15. flexed so as to permit the tab 20 to engage the forward edge 21. Reference to Figure 1 will indicate clearly that the major portion of the blade lies within the channel, and is.

The blade is then pile wire is being employed, the loops which would ordinarily have been engaged by the blade will not be damaged but will be encountered by the attenuated edge 26. This edge will tend to cut whatever loops it encounters and although its cutting efiect may not be as efficient as that of the blade edge 27, no damage will occur to the loops. It will be noted that the auxiliary cutting edge 26 lies in its entirety forwardly of the blade 17, and it will therefore be understood that the cutting edge 26 is normally inoperative and will function only when the blade 17 is absent, as it may be after breakage thereof. It is also to be noted that the cutting edge 26,

by virtue of the fact that it lies wholly in front of the blade 17, may be substantially aligned with the cutting edge 27 so as to serve with maximum efficiency should the blade be absent.

Reference to Figure 2 will show clearly how I have provided an elongated aperture 28 in thebottom wall 12 and immediately below the undercut recess 15. This aperture permits the insertion of a suitable tool to force out the rear tip 16 of the blade 17. Such manipulation is highly desirable in case the blade 17 has broken, leavingits rear tip wedged underneath the overhang 14:. The aperture 28 is so positioned that it does not impair the firmness with which the blade is normally supported.

In Figure 3 I have shown a pile wire head wherein the depth thereof is greater than the depth shown in Figure 1, and wherein there is accordingly a plug or insert 29 which lies along the bottom of the channel and is adapted to underlie the blade to be accommodated in said channel. In such a pile wire head, I provide an aperture 30 in the side wall 11, the aperture being so positioned as to permitthe insertion of a suitable tool into the undercut recess 15 within which the rear end of a blade may become wedged. An aperture similar to the aperture 30 may also be provided in the rear wall of the device of Figure 3, but I have found that a single aperture is quite satisfactory for the purpose intended.

It will thus be seen that I have provided a device which is not only simple in construction but whichenhances the smooth and efficient employment of pile wire cutters of the character illustrated and described. Not only is the manufacture of the device simplified, but the possible damage to the loops is obviated in case of failure of the actual blade. And moreover, the substitution of a new blade in such an event is greatly facilitated, and delay is avoided by the provision of suitable apertures adjacent to the undercut recess.

It will be obvious that changes in the details herein described and illustrated for the purpose of explaining the nature of my invention may be made by those skilled in the art without departing from the spirit and scope of the invention as expressed in the appended claims. It is therefore intended that these details be interpreted as illustrative, and not in a limiting sense.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is 1. In a pile wire head comprising a channelled element adapted to receive a blade, a

blade-supporting extension lying forwardly of the channel and comprising a forward extension of one wall of the channel, said extension being provided with means for engaging the forward edge of an accommodated blade, and the extremity of said extension being turned into substantially the plane of the blade when accommodated in the channel and being provided with an auxiliary normally inoperative cutting edge lying wholly in advance of the blade.

2. A pile wire head comprising a channelled element adapted to receive a blade, the rear portion of the head being provided with an undercut recess for accommodating the rear end of the blade thereunder, and a wall portion adjacent to said recess being provided with an aperture therethrough to permit access to said accommodated rear end of the blade.

3. A pile wire cutter comprising a pile wire head having two upstanding walls defining a blade receiving channel therebetween, one of the Walls extending a substantial distance beyond the other wall to provide a guard and a blade end engaging portion, said extension being substantially conterminous at its upper edge with the upper edge of the rest of the wall of which it is an ex tension, and a blade engaging member formed in said extension, by cutting downwardly from the upper edge of said extension.

In witness whereof I have signed this specification.

MARCUS B. BEHRMAN. 

